Today I went and shot 30 more rounds of the same suspect lot.
Of the 30, 17 had more pronounced ejector swipes. All the cases had cratered primers, most had dented case mouths from what I assume increased ejection speed and hitting the case deflector harder. They also have a ring around the base.
Forgive the bad pics, using my phone.
Of the 30 rounds, I grabbed 5 cases at random and measured.
1.748
1.753
1.753
1.750
1.749
Then I sized them, or tried too. I got 3 done before the 4th got stuck in my die. I think I used too much lube as I lubed them individually
After sizing I measured.
1.758
1.762
1.762
Those are in the same order BTW.
I emailed Arms Unlimited asking if anyone has had any pressure signs as well but they had not and instead referred me to the manufacturer for any further inquiries.